[R] how do i use the get function to obtain an element from a list...
Juan Manuel Barreneche
jumanbar at gmail.com
Tue Aug 21 21:35:25 CEST 2007
my problem can be explained with the following example:
x <- 1:12
y <- 13:24
a <- data.frame(x = x, y = y)
## if i write
a$x
## it returns
[1] 1 2 3 4 5 6 7 8 9 10 11 12
## but the function get doesn't recognize a$x. Instead it produces the
following error:
get("a$x")
Error in get(x, envir, mode, inherits) : variable "a$x" was not found
i intend to do it inside a loop, using a new object (and hence, a new
name) for each iteration (i.e., instead of a$x, it would be a$1, a$2,
a$3, and so on, for a million times).
i would greatly appreciate it if someone could help me on this issue,
thanks in advance,
Juan Manuel Barreneche,
Zoología de Vertebrados,
Facultad de Ciencias,
UDELAR, Uruguay.
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